Dr. Duffy is a professor of Hydrology in Department of Civil Engineering, Pennsylvania State University. He is the lead of the PIHM group and advisor of PIHM/SHUD development. His primary research interests are stochastic and numerical modeling of groundwater flow and solute transport and modeling large-scale hydrologic systems.

Interests
  • Stability of a Two-State Hillslope Model
  • Concentration-Discharge Dynamics in Watersheds
  • Visualizing Dynamics of Layered Hillslopes
  • Spatio-temporal analysis of the forced Richards Equation
  • Theory and Numerical Experiments for Macroporous Hillslopes
  • Modeling Soil Moisture of a Semi-arid Hillslope
  • Modal Analysis of Complex Groundwater Chemistry
Education
  • Ph.D. Hydrology, 1982

    New Mexico Institute of Mining and Technology

  • M.S. Hydrology, 1976

    New Mexico Institute of Mining and Technology

  • B.S. Environmental Engineering, 1975

    New Mexico Institute of Mining and Technology